Texas Instruments CBL 2 User manual


Getting
Started with
the CBL 2™
System
LabPro is a trademark of Vernier Software & Technology.
Radio Shack is a trademark of Technology Properties, Inc.

II GETTING STARTED WITH THE CBL 2™ SYSTEM
Safety Instructions
Observe all warnings, cautions, and other safety instructions indicated on the product and in the documentation. These
instructions are intended to reduce the risk of injury, possible electrical shock, or damage to the unit.
AC Voltages
ªWARNING! Never attempt to measure AC voltages from a wall outlet. Connecting 115/230 Volts AC to any input probe may
cause serious injury or electrical shock, and may damage the unit.
Low-Voltage Unit
ªWARNING! This product is designed for use with low voltages. Personal injury and damage to the unit may occur if voltages
exceed 30 Volts DC on CH1, CH2, or CH3; or if voltages exceed 5.5 Volts DC on SONIC, DIG IN, or DIG OUT. To reduce risk of
injury, do not connect probes to circuits that contain voltage sources more than 30 Volts DC. All voltage sources must be fully
isolated from AC power lines.
Analog Inputs
ªCAUTION! It is very important that the ground connections of the analog inputs are never connected to different potentials.
These ground connections are all in common. Connecting the grounds to different potentials may damage the CBL 2™ unit.
Batteries
ªWARNING! Do not heat, burn, or puncture batteries. Batteries contain hazardous chemicals and may explode or leak.
Take the following precautions when replacing batteries.
• Do not leave batteries within the reach of children.
• Do not mix new and used batteries. Do not mix brands (or types within brands) of batteries.
• Do not mix rechargeable and non-rechargeable batteries.
• Install batteries according to polarity (+ and - ) diagrams.
• Do not place non-rechargeable batteries in a battery recharger.
• Properly dispose of used batteries immediately.
• Do not incinerate or dismantle batteries.
FCC Information Concerning Radio Frequency Interference
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC
rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference with radio communications. However, there is no guarantee that interference will not
occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the
equipment off and on, you can try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/television technician for help.
CAUTION: Any changes or modifications to this equipment not expressly approved by Texas Instruments may void your authority
to operate the equipment.
Important notice regarding book materials
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including but not limited to any implied warranties of
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2000, 2003 Texas Instruments Incorporated. Except for the specific rights granted herein, all rights are reserved.

© 2000, 2003 TEXAS INSTRUMENTS INCORPORATED GETTING STARTED WITH THE CBL 2™SYSTEM III
Contents
Collecting Data Out of the Box Using the CBL 2™ System.....................vi
Introduction.......................................................................................... 1
Keys ......................................................................................................... 2
LEDs ......................................................................................................... 2
Software................................................................................................... 2
Sensors..................................................................................................... 3
Getting Started ..................................................................................... 4
Put the Pieces Together ............................................................................4
Transfer DataMate to the Calculator ......................................................... 4
Getting Started with DataMate ............................................................. 5
Special Use Calculator Keys....................................................................... 6
Start the DataMate App............................................................................ 6
Connect a Sensor to the CBL 2 System .....................................................6
Calibrate a Sensor (optional) ............................................................. 7
Zero a Sensor (optional) .................................................................... 9
Select the Data Collection Mode............................................................... 9
Change the Time Graph Settings (optional)..................................... 10
Change the Advanced Time Graph Settings (optional)..................... 11
Collect the Data...................................................................................... 12
Store Latest Run.............................................................................. 13
Graph the Data....................................................................................... 13
Select Region (optional) ..................................................................14
Rescale Graph (optional) ................................................................. 14
More Graphs (optional)................................................................... 15
Analyze the Data .................................................................................... 15
Collect Data with Quick Set-Up........................................................... 16
Save and Retrieve Experiments ............................................................ 17
Save an Experiment ................................................................................17
Load an Experiment ................................................................................ 18
Delete an Experiment.............................................................................. 19
Delete All Experiments ............................................................................ 19
Using the CBL 2™ System with Other Programs.................................. 20
Storing and Retrieving Programs with DATADIR .................................. 20
Start the DATADIR Program ....................................................................20

IV GETTING STARTED WITH THE CBL 2™SYSTEM © 2000, 2003 TEXAS INSTRUMENTS INCORPORATED
Store a Program ..................................................................................... 21
Retrieve a Program from Storage............................................................ 22
Delete a Program from Storage .............................................................. 22
Check Memory....................................................................................... 23
Collect Garbage ..................................................................................... 23
Exit the DATADIR Program ..................................................................... 23
DataMate Screen Reference................................................................ 24
Advanced Time Graph Settings............................................................... 24
Analyze Options ..................................................................................... 24
Calibration ............................................................................................. 25
Experiment Menu .................................................................................... 25
Graph Menu .......................................................................................... 25
Main Screen ........................................................................................... 26
Rescale Graph ........................................................................................ 26
Select Channel [to Zero] ......................................................................... 27
Select Mode ........................................................................................... 27
Select Sensor.......................................................................................... 28
Setup ..................................................................................................... 28
Time Graph Settings............................................................................... 29
Tools...................................................................................................... 29
Activity 1 –Add Them Up!! ................................................................ 31
Activity 2 –Light from Afar................................................................. 41
Activity 3 –Dueling Sensors: Which Temperature is Which? ............... 49
Activity 4 –Fruit Battery...................................................................... 59
Activity 5 –Lights Out! ....................................................................... 69
Activity 6 –Night and Day................................................................... 79
Appendix A: General Information.......................................................A-1
Battery and Adapter Information........................................................... A-1
Operating Power Requirements ..................................................... A-1
When to Replace Batteries.............................................................A-1
Recommended Batteries ................................................................ A-1
Battery Precautions........................................................................A-1
Installing the AA (LR6) Batteries .....................................................A-2
Connecting an Optional AC Adapter .....................................................A-2
Approved AC Power Adapters .......................................................A-2
Building an External Battery Adapter Cable............................................A-2
Connecting an External 6-Volt Battery ........................................... A-3

© 2000, 2003 TEXAS INSTRUMENTS INCORPORATED GETTING STARTED WITH THE CBL 2™SYSTEM V
Error Messages ..................................................................................... A-3
DataMate Troubleshooting ........................................................... A-3
CBL 2™Error Messages ................................................................ A-7
Texas Instruments (TI) Support and Service Information....................... A-11
For General Information.............................................................. A-11
For Technical Questions............................................................... A-11
For Product (hardware) Service.................................................... A-11
Other TI Products and Services ............................................................ A-11
Warranty Information ......................................................................... A-12
Customers in the U.S. and Canada Only...................................... A-12
Australia & New Zealand Customers only .................................... A-12
All Other Customers ................................................................... A-13
Appendix B: Command Tables ........................................................... B-1
Command 0 ..................................................................................B-1
Command 1 ..................................................................................B-1
Command 2 ..................................................................................B-3
Command 3 ..................................................................................B-3
Command 4 ..................................................................................B-5
Command 5 ..................................................................................B-6
Command 6 ..................................................................................B-7
Command 7 ..................................................................................B-8
Command 8 ..................................................................................B-9
Command 9 ..................................................................................B-9
Command 10 ..............................................................................B-10
Command 12 ..............................................................................B-10
Command 102 ............................................................................B-12
Command 115 ............................................................................B-12
Command 116 ............................................................................B-13
Command 117 ............................................................................B-13
Command 1998 ..........................................................................B-13
Command 1999 ..........................................................................B-13
Command 2001 ..........................................................................B-13
Command 201 ............................................................................B-14

VI GETTING STARTED WITH THE CBL 2™SYSTEM © 2000, 2003 TEXAS INSTRUMENTS INCORPORATED
Collecting Data Out of the Box Using the CBL 2™System
1. Insert batteries into the CBL 2.
2. Connect CBL 2 to a TI graphing calculator using the unit-to-unit link cable. (Use
the cradle if desired; see diagram on the cradle or the instructions on page 4.)
If you are using the TI-83 Plus or TI-83 Plus Silver Edition, proceed to step 4.
If you are using the TI-89, TI-92 Plus, or Voyage™200 PLT (personal learning
tool) proceed to step 5.
3. Reset the memory of your calculator. Reset is necessary
only for the TI-73, TI-82, and TI-83. To reset RAM, press
yL, choose 7:Reset, then choose 1:All RAM, and
then choose 2:Reset.
This is a required step due to the size of the DataMate
programs that are stored in RAM.
4. Put calculator in Receive Mode (waiting to receive information):
♦ For TI-73, press 9, choose YLINK, press "to RECEIVE, and then press
b.
♦ For the TI-82, TI-83, TI-83 Plus, and TI-83 Plus Silver Edition, press y8,
press ~to RECEIVE, then press Í.
5. Press the TRANSFER button on the CBL 2. The CBL 2 detects the calculator to
which it is connected and sends the appropriate version of the built-in
DataMate software. (This software controls the CBL 2 and how it collects data.)
6. Plug your Stainless Steel Temperature sensor into Channel 1 (CH1) of the CBL 2.
7. Run DataMate:
♦ For TI-83 Plus and TI-83 Plus Silver Edition, press 9. Press †or }to
highlight DATAMATE and press Í.
♦ For the TI-73, TI-82, and TI-83, press . Press ÀDATAMATE or press
Í. DATAMATE is pasted to your home screen; press Íagain to
confirm your choice.
♦ For the TI-89, TI-92 Plus, and Voyage 200 PLT, if the Apps desktop is turned
on, press O, highlight DataMate, and press ¸.
or
If the Apps desktop is turned off, press ¹O, highlight DataMate, and
press ¸.
8. DataMate automatically identifies the Stainless Steel
Temperature sensor, loads its calibration factors, and
displays the name of the sensor, as well as the
temperature in degrees C. It also loads a default
temperature experiment.
9. Start collecting data with the default experiment. Hold the temperature sensor
in your hand and press ÁSTART to begin data collection.

© 2000, 2003 TEXAS INSTRUMENTS INCORPORATED GETTING STARTED WITH THE CBL 2™SYSTEM VII
10. You will see a real-time graph of temperature. Wait
about 30 seconds and then press ¿to stop collecting
data.
When finished, your graph will be similar to the one
shown here.
11. You just successfully collected data. See the rest of the manual for other
DataMate options (other sensors, analysis, saving data, etc.).
12. Explore the world around you.

VIII GETTING STARTED WITH THE CBL 2™SYSTEM © 2000, 2003 TEXAS INSTRUMENTS INCORPORATED

© 2000, 2003 TEXAS INSTRUMENTS INCORPORATED GETTING STARTED WITH THE CBL 2™ SYSTEM 1
Introduction
The Calculator-Based Laboratory 2 (CBL 2™) system, a second generation of the
Calculator-Based Laboratory™ system, is a portable, handheld, battery-operated
data collection device for collecting “real-world” data. Data collected with a CBL 2
can be retrieved and analyzed by TI graphing calculators. With the CBL 2 and
appropriate sensors, you can measure motion, temperature, light, sound, pH, force
and more.
CBL 2 has a port to connect and communicate with TI graphing calculators. A 6-inch
unit-to-unit link cable is included with the CBL 2 for this purpose. For added
portability, the CBL 2 unit comes with a cradle which attaches the calculator to the
unit so the whole thing fits easily into one hand.
With a TI-GRAPH LINK™ cable (sold separately), you can also link the CBL 2 to a
personal computer. As future software upgrades become available on the TI web
site, you can download the software to your PC and then use a TI-GRAPH LINK cable
to upgrade your CBL 2.
CBL 2 comes with the following equipment and sensors:
♦ CBL 2
♦ 6-inch unit-to-unit link cable
♦ calculator cradle
♦ Stainless steel temperature sensor
♦ TI light sensor
♦ TI voltage sensor
♦ 4 AA (LR6) alkaline batteries
Figure 1. CBL 2 Features
Channel 1
Channel 2
Channel 3
DIG/SONIC Channel
Cradle Release
Buttons
AC Adapter Port
TRANSFER
LEDS
QUICK SETUP
START/STOP
I/O Port

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ETTING STARTED WITH THE CBL 2™SYSTEM © 2000, 2003 TEXAS INSTRUMENTS INCORPORATED
Keys
CBL 2™has three keys:
TRANSFER begins transfer of programs or Calculator Software Applications
(apps) between the CBL 2 and an attached TI graphing calculator.
QUICK SET-UP clears any data stored in the CBL 2 system’s MEMORY, then polls all
channels for auto-ID sensors and sets them up to collect data.
QUICK SET-UP is used when a calculator is not attached to CBL 2
and works only with auto-ID sensors.
START/STOP begins sampling for Quick Set-Up. Sampling continues until the
default number of samples is collected or you press START/STOP
again. This button also acts as a manual trigger, similar to the
TRIGGER button on the original CBL.
LEDs
CBL 2 also has three LEDs:
Red indicates an error condition.
Yellow indicates that CBL 2 is ready to collect data samples.
Green indicates CBL 2 is collecting data.
Software
The CBL 2 comes with DataMate already loaded. DataMate is a multi-purpose user
program containing the basic information needed to run experiments with a CBL 2,
a TI graphing calculator, and various sensors.
DataMate is provided for the following TI graphing calculators: TI-73, TI-82, TI-83,
TI-83 Plus, TI-83 Plus Silver Edition, TI-86, TI-89, TI-92, TI-92 Plus, and Voyage™200
PLT. For the TI-83 Plus, TI-83 Plus Silver Edition, TI-89, TI-92 Plus, and Voyage 200
PLT, DataMate is a calculator software application that is run from the APPS menu;
for the other calculators, it is a program that is run from the calculator’s program
menu. The CBL 2 automatically detects which calculator is attached and sends the
appropriate software.
Because of the differences in memory between the calculators, there are some
differences in functionality between by the different versions of DataMate.
♦ The TI-83 Plus, TI-83 Plus Silver Edition, TI-86, TI-89, TI-92, TI-92 Plus, and
Voyage 200 PLT versions support all of the DataMate functions.
♦ The TI-83 version of DataMate supports all of the functions except SAVE/LOAD.
♦ The TI-73 version of DataMate supports all of the functions except SAVE/LOAD
and ADD MODEL.

© 2000, 2003 TEXAS INSTRUMENTS INCORPORATED GETTING STARTED WITH THE CBL 2™SYSTEM 3
♦ The TI-82 version of DataMate supports only auto-ID sensors: temperature, light,
voltage, and the CBR™device or the new Vernier Software and Technology
(Vernier) motion detector. It supports all of the functions except SAVE/LOAD,
SELECT REGION, ADD MODEL, and ANALYSIS.
See page 5 for instructions on using the DataMate software.
Sensors
Three sensors are provided with the CBL 2™(stainless steel temperature, TI light,
and TI voltage), and many other available sensors can be used with CBL 2, including
the CBR and the following Vernier sensors:
CBL™Motion Detector Pressure Sensor
CBL Microphone Thermocouple
Digital Control Unit Colorimeter
Dual-Range Force Sensor Conductivity Sensor
Student Force Sensor Ion-Selective Electrodes (NO3
-, CI-, Ca2+, NH4+)
Flow Rate Sensor Ion-Selective Electrode Amplifier
Magnetic Field Sensor Instrumentation Amplifier
Turbidity Student Radiation Monitor
Low-g Accelerometer CO2Gas Sensor
25-g Accelerometer O2Gas Sensor
3-Axis Accelerometer Dissolved Oxygen Sensor
Extra Long Temperature Sensor Biology Gas Pressure Sensor
Current/Voltage Sensor System Gas Pressure Sensor
Vernier Photogate Respiration Monitor Belt
Direct-Connect Temp Sensor EKG Sensor
Stainless Steel Temp Sensor Exercise Heart Rate Monitor
Relative Humidity Sensor Heart Rate Monitor
pH Sensor Barometer
Note: For updated lists of available sensors, see the web site for Vernier Software and
Technology at www.vernier.com.
Sensors are attached to CBL 2 though input or output connections called channels.
CBL 2 has three analog channels (CH1, CH2, CH3) and one other channel (DIG/
SONIC) that can be used for ultrasonic motion detector or digital inputs and
outputs.
When using DataMate, the auto-ID feature on the CBL 2 allows the unit to
automatically identify specific sensors when you connect them to the unit. When
you connect an auto-ID sensor to a channel, CBL 2 detects the sensor, loads
calibration factors and a default experiment, and shows the channel number and
sensor type in the calculator display. Auto-ID sensors include the stainless steel
temperature, TI voltage, and TI light sensors included with the CBL 2, as well as the
CBR and the Vernier motion detector. (Additional Vernier auto-ID sensors are
planned.)

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ETTING STARTED WITH THE CBL 2™SYSTEM © 2000, 2003 TEXAS INSTRUMENTS INCORPORATED
Sensors that are not auto-ID can also be used with CBL 2™by selecting the sensor
type from a list of sensors in DataMate.
Note: Technical specifications of TI sensors (including chemical tolerance) are provided in the
CBL 2 Technical Reference document available on the TI web site and the Resource CD.
Getting Started
Before you begin working with the CBL 2 system and the DataMate software, you
must connect the CBL 2 and your calculator and transfer the software from CBL 2 to
your calculator.
Put the Pieces Together
Figure 2. Connecting CBL 2 to a Calculator
1. Insert the upper end of the calculator into the cradle.
2. Press down on the lower end of the calculator until it snaps in place.
3. Slide the back of the cradle onto the front of the CBL 2 until it clicks in place.
4. Plug one end of the 6-inch unit-to-unit link cable into the I/O port in the end of
the CBL 2, and plug the other end of the cable into the I/O port in the end of
the calculator.
The cradle cannot be used with the TI-92, TI-92 Plus, or Voyage™200 PLT.
Attach these calculators using a unit-to-unit cable.
Transfer DataMate to the Calculator
DataMate comes already loaded on your CBL 2. When transferring DataMate from
CBL 2 to the calculator, the CBL 2 automatically detects which calculator is attached
and transfers the appropriate version of DataMate.

© 2000, 2003 TEXAS INSTRUMENTS INCORPORATED GETTING STARTED WITH THE CBL 2™SYSTEM 5
To transfer DataMate to a TI-83 Plus and TI-83 Plus Silver Edition calculator, follow
these steps:
1. Connect the calculator to CBL 2™with the unit-to-unit link cable.
2. Put the calculator in Receive mode. (For the TI-83 Plus and TI-83 Plus Silver
Edition, press y8~Í.)
3. Push TRANSFER on CBL 2. The program/app is transferred and appears in the
calculator’s program list or application list.
4. When the transfer is complete, press y5on the calculator.
See steps 4 and 5 on page vi for the TI-73, TI-82, TI-83 Plus, and TI-83 Plus Silver
Edition instructions.
Note: DataMate on the TI-89, TI-92 Plus, and Voyage™ 200 PLT is transferred in three
segments/files, but only one will display in the App menu. All three segments are necessary
for DataMate to run on these units.
Getting Started with DataMate
This section of the User Guide explains the procedures for using DataMate. The
instructions were written with the DataMate app for TI-83 Plus and show TI-83 Plus
screen examples. (See page 2 for information about the differences between
DataMate programs/apps for the various TI graphing calculators.)
The basic steps for conducting an experiment with CBL 2, sensor(s), and a TI
graphing calculator are:
1. Connect the sensor(s) to the CBL 2 system, connect CBL 2 and your calculator,
and run the DataMate program or App. (See the next section, Start the
DataMate App.)
2. Select the data collection mode, if necessary. (CBL 2 contains default experiment
settings for most sensors.) (See page 9.)
3. Collect the data. (See page 12.)
4. Graph the data. (See page 13.)
In addition, DataMate allows you to calibrate some sensors, make changes to
graphs, and analyze collected data with pre-programmed options. Procedures for
all of these tasks are given on the following pages.
It is not necessary to have a calculator connected to the CBL 2 to collect data. The
Quick Set-Up feature on the CBL 2 allows you to collect data without having a
calculator connected to the CBL 2. You can then transfer the data to your calculator
for graphing and analysis. The Quick Set-Up procedure is explained on page 16.

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ETTING STARTED WITH THE CBL 2™SYSTEM © 2000, 2003 TEXAS INSTRUMENTS INCORPORATED
Special Use Calculator Keys
In addition to the keystrokes shown on the DataMate screens, two calculator keys
have special uses in DataMate:
♦ Press ‘on the DataMate Main Screen or the Setup screen to restore
DataMate’s default settings. For example, if the sensor setup and/or data
collection mode setting are not what you expect, press ‘to reset them.
♦ Press ¿while collecting data to stop data collection.
Start the DataMate App
Note: If you are using the TI-73, TI-82 or TI-83, it is recommended that you remove any non-
DataMate programs from the calculator before loading DataMate. See step 3 on page vi.
1. Connect the CBL 2™to the calculator.
2. Press Œ.
3. Press hif needed to move the cursor to DATAMATE and press Í.
The DataMate title screen displays.
This screen shows both the DataMate program version
number (VER 1.14 in the example) and the operating
system version number (ROM: 1.12 in the example).
Then the Main Screen appears.
Connect a Sensor to the CBL 2 System
1. Connect the sensor to the appropriate channel.
Note: When connecting sensors to analog channels, you should use the channels in numerical
order. In other words, connect the first sensor to channel 1 (CH1), the second sensor to
channel 2 (CH2), and the third sensor to channel 3 (CH3). If you are using only one sensor, it
should be connected to channel 1.

© 2000, 2003 TEXAS INSTRUMENTS INCORPORATED GETTING STARTED WITH THE CBL 2™SYSTEM 7
2. If the sensor is auto-ID, the channel number and sensor
type automatically display on the Main Screen. Go to
3. Select the Data Collection Mode on page 9.
or
If the sensor is not auto-ID, follow the steps below to tell
the CBL 2™that the sensor is connected.
4. On the DataMate Main Screen, press ÀSETUP.
5. Press †as needed to move the cursor to the channel to
which the sensor is connected. Press Í. A list of
sensors appears.
5. If the sensor you want is not on the list, press ¬MORE to see more choices.
(The list covers several screens.)
6. Press the number beside a sensor to choose that sensor.
Note: Some sensors, such as accelerometer or pressure, display another screen and require
you to select a particular sensor, preferred unit of measure, or calibration.
7. When you finish choosing sensors, press ÀOK to return to the Main Screen.
Calibrate a Sensor (optional)
When a sensor is selected, DataMate automatically loads the default calibration
settings. Although it is not necessary, if you choose to calibrate a sensor, use the
following procedure.
There are two ways to calibrate a sensor. The first way is to monitor the voltage
until it is stable and enter that value; the second way is to manually enter the
values. You will need to consult the sensor literature for proper calibration
procedures. The examples below show calibration for the pH sensor.
To calibrate the pH sensor by monitoring the voltage, you will need two solutions
with known pH values; for example, buffer solutions with values of 4 and 10.
Follow these steps:
1. On the Main Screen, press À.

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ETTING STARTED WITH THE CBL 2™SYSTEM © 2000, 2003 TEXAS INSTRUMENTS INCORPORATED
2. Press †as needed to move the cursor to the sensor you
want to calibrate. Press ÁCALIBRATE.
Note: Not all sensors can be calibrated. If you select a sensor that
cannot be calibrated, DataMate does not respond when you press
Á
CALIBRATE.
3. Press ÁCALIBRATE NOW.
4. Put the pH sensor in the 4 buffer solution. Watch the
screen until the voltage number stabilizes and then press
Í.
5. Key in the value of the buffer solution.
6. Repeat steps 3 and 4 for the 10 buffer solution.
7. Press ÀOK to return to the Setup screen.
Note: Refer to the documentation provided with your sensor for calibration procedures and
default calibration values.
You can also calibrate the pH sensor by entering values. This procedures is used if a
full calibration has been done previously and you want to manually input the new
slope and intercept values. Follow these steps:
1. On the Setup screen, press †as needed to move the
cursor to the sensor you want to calibrate. Press Á
CALIBRATE NOW.
2. Press ÂMANUAL ENTRY.
3. Key in the slope and press Í.

© 2000, 2003 TEXAS INSTRUMENTS INCORPORATED GETTING STARTED WITH THE CBL 2™SYSTEM 9
4. Key in the intercept and press Í. The Calibration screen is displayed with the
new values.
5. Press ÀOK to return to the Setup screen.
Zero a Sensor (optional)
1. On the Setup screen, press ÂZERO. The Select Channel
screen appears.
Note: Not all sensors can be zeroed (for example, temperature
probes and light probes). DataMate displays only the sensors that
can be zeroed.
2. Press the number beside the sensor you want to zero. A
screen appears showing the current reading(s) for the
selected sensor(s).
(In this example, ÂALL CHANNELS was pressed, so both
sensors are selected.)
3. Press Íto zero the sensor(s). The Main Screen appears.
Note: The new calibrations and zeros are not retained after quitting DataMate. They are
only valid during the current session. Also, new calibrations and zeros can be reset to
defaults during the current session by going to the Main Screen and pressing
‘
.
Select the Data Collection Mode
For each sensor from Vernier, DataMate loads a default experiment (data collection
mode) appropriate for the sensor. The default data collection mode for all sensors is
Time Graph (collecting data points at a predetermined rate). For a description of
each of the data collection modes, see Select Mode screen on page 27.
Note: If you close the DataMate program and then re-open it, the mode setting will be the
same as when you closed it. However, if you exit DataMate in some other manner, the mode
setting may be different when you re-open it. Or, you may open DataMate and find mode
and sensor settings that are “left over”from a previous experiment. In any case, press
‘
to return the mode and sensor settings to the default.
To change the data collection mode, follow the steps below.
1. On the DataMate Main Screen, press ÀSETUP.

10 GETTING STARTED WITH THE CBL 2™SYSTEM © 2000, 2003 TEXAS INSTRUMENTS INCORPORATED
2. Press }or †as needed to move the cursor to MODE and
press Í. A list of data collection modes appears.
3. Press the number beside the mode you want.
Note: If you choose Time Graph mode, another screen appears allowing you to choose the
time interval between samples and the number of samples that you want. See Change Time
Graph Settings below for instructions.
4. Press ÀOK twice to return to the Main Screen.
Change the Time Graph Settings (optional)
If you choose Time Graph on the Select Mode screen, the Time Graph Settings
screen appears. Each sensor has a default time interval between samples (in
seconds) and default number of samples (data points). To change the settings from
the default, follow the steps below:
If you press ÁTIME GRAPH on the Select Mode screen, the
Time Graph Settings screen appears.
1. Press ÁCHANGE TIME SETTINGS.
2. Key in the time interval between samples (in seconds)
and press Í.
3. Key in the number of samples and press Í. The Time Graph Settings screen is
displayed again. (EXPERIMENT LENGTH in seconds is calculated automatically.)
4. Press ÀOK to exit. The Setup screen appears.
or
Press ÂADVANCED to change the advanced settings. (See Change the
Advanced Time Graph Settings for instructions.)

© 2000, 2003 TEXAS INSTRUMENTS INCORPORATED GETTING STARTED WITH THE CBL 2™SYSTEM 11
Change the Advanced Time Graph Settings (optional)
DataMate contains default time graph settings for each sensor. You can change the
“window”in which the collected data is graphed, and you can change the type of
triggering used in the experiment.
Follow the steps below to change advanced time graph settings:
If you press ÂADVANCED on the Time Graph Settings
screen, the Advanced Time Graph Settings screen appears.
YMIN and YMAX refer to the “window”in which the
collected data is graphed. YMIN refers to the lower bound
of the graph, and YMAX refers to the upper bound of the
graph. The YMIN and YMAX values shown on the screen
are the default range of the sensor in channel 1. (This will vary depending on
the sensor being used. For example, for the Temperature sensor, the range is
.20 to 125.)
1. To change the window range to be graphed,
press ÁCHANGE GRAPH SETTINGS.
A list of the connected sensors appears.
2. Press the number beside the sensor you want.
3. To change the type of triggering, press ÂCHANGE
TRIGGERING.
In the example shown, there are two types of triggering:
♦ For option 1 or 2, the CBL 2™will trigger the start of
data collection based on a change in the data being
collected. (This is called threshold triggering.)
♦ For option 3, MANUAL TRIGGER, the CBL 2 will start collecting data when the
START/STOP button is pressed.
♦ For option 4, NONE, no special triggering will be set.
4. Press the number beside the type of triggering you want.
If you select NONE, the Advanced Time Graph Settings screen appears.
or
If you select MANUAL TRIGGER, the triggering option is changed and the
Advanced Time Graph Settings screen appears.
or
If you select threshold triggering, DataMate asks you to
choose the trigger type.
♦ INCREASING means that the values of the data being
collected (such as light intensity or temperature) will
be increasing.

12 GETTING STARTED WITH THE CBL 2™SYSTEM © 2000, 2003 TEXAS INSTRUMENTS INCORPORATED
♦ DECREASING means that the values of the data being
collected will be decreasing.
5. Press the number beside the trigger type you want.
6. Key in the number (the threshold) at which you want
data collection to begin and press Í. (Put in a
threshold value in the units of the sensor you are using
such as ¡C for temperature or Newtons for force.)
When the values of the data being collected reach this
number, CBL 2™will begin storing data.
7. Key in the number (percent) of data you want the CBL 2 to prestore and press
Í. The Advanced Time Graph Settings screen appears.
“Prestore”is the amount of data collected before the threshold was reached
that you want to keep (10 percent, 20 percent, and so on). From the time the
experiment begins until the threshold is reached, CBL 2 collects data in its
“buffer.”When the threshold is reached, CBL 2 begins storing the data it is
collecting and discards the data it collected before the threshold was reached
unless a prestore value is entered.
8. Press ÀOK to exit the screen.
9. Press ÀOK again to return to the Setup screen.
Collect the Data
To start your experiment, press ÁSTART on the DataMate Main Screen. The CBL 2
begins collecting data according to the data collection mode you have set.
See page 27 for a description of the data collection modes.
When you finish collecting data, the Graph Menu screen is displayed. See Graph the
Data below for more information.
Note: In Time Graph mode, the data from CH1 is automatically graphed in REALTIME when
you press £. Values are shown in the upper right corner of the screen as the data is plotting.